matte

having a dull or lusterless surface:

a dull or dead surface, often slightly roughened, as on metals, paint, paper, or glass.

a tool for producing such a surface.

Metallurgy. an unfinished metallic product of the smelting of certain sulfide ores, especially those of copper.

Movies. matte shot.

to finish with a matte surface.

a mass of timber caved beneath overburden so as to cushion the fall of the overburden and separate it from mineral to be extracted beneath.